The cool thing about our study is we managed to look at the product of intensity and duration,

which we call exercise strain, and which whoop does a great job of measuring.

We found that as strain increases and as your exercise finishes closer and closer to when you

typically go to sleep, we find that your disruption to sleep and heart rate during sleep get progressively

worse. So two really interesting and clear what we call dose response relationships between

the timing of exercise and sleep and also the strain of exercise.

Hi everybody. I am Emily Capitaluppo, Senior Vice President of Research Algorithms and Data, and today I am joined by the incredible Josh Leota all the way here from Melbourne, Australia.

Thank you. Thanks for having me. It's great to be here.

We are so excited to have you. Josh has his PhD from Monash University, where he's part of the Sleep and Circadian Biology Research Program.

And we've been working together for almost four years now.

Yeah, yeah, close to it.

Recently, we've had two papers published that came out of that research collaboration.

We're going to talk about both of them in this podcast.

So we are so, so honored that you flew halfway around the world to be here with us

today and talk about these really great papers. Yeah, great. I'm excited. So why don't we start off?

How did we start working together? What was this project we've been working on for the last four years?

You're right. About four years ago, I was just starting my PhD and I was working with elite athletes looking

at sleep and performance.

And I was struggling to find the right tools to record and to monitor sleep.

With athletes, it's a tricky population to work with because they're so focused on their

performance. and the current

methods and techniques that we were using weren't quite up to scratch so I was looking at what was

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